181960890 has 16 divisors (see below), whose sum is σ = 436706208. Its totient is φ = 48522896.

The previous prime is 181960879. The next prime is 181960903. The reversal of 181960890 is 98069181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3032652 + ... + 3032711.

It is an arithmetic number, because the mean of its divisors is an integer number (27294138).

Almost surely, 2^181960890 is an apocalyptic number.

181960890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

181960890 is an abundant number, since it is smaller than the sum of its proper divisors (254745318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181960890 is a wasteful number, since it uses less digits than its factorization.

181960890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6065373.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 181960890 is about 13489.2879723134. The cubic root of 181960890 is about 566.6645147938.

The spelling of 181960890 in words is "one hundred eighty-one million, nine hundred sixty thousand, eight hundred ninety".